package com.newp.xiaopan.action.system;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

/**
 * @author 张霄鹏
 */
@Controller("kaptchaImageAction")
public class KaptchaImageAction extends BaseAction {

	private static final long serialVersionUID = 1L;
	private Producer kaptchaProducer = null;

	@Autowired
	public void setKaptchaProducer(Producer kaptchaProducer) {
		this.kaptchaProducer = kaptchaProducer;
	}

	public void getKaptcha() throws Exception {
		HttpServletRequest request = ServletActionContext.getRequest();
		HttpServletResponse response = ServletActionContext.getResponse();
		response.setDateHeader("Expires", 0);
		// Set standard HTTP/1.1 no-cache headers.
		response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
		// Set IE extended HTTP/1.1 no-cache headers (use addHeader).
		response.addHeader("Cache-Control", "post-check=0, pre-check=0");
		// Set standard HTTP/1.0 no-cache header.
		response.setHeader("Pragma", "no-cache");
		// return a jpeg
		response.setContentType("image/jpeg");
		// create the text for the image
		String capText = kaptchaProducer.createText();
		// store the text in the session
		request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
		// create the image with the text
		BufferedImage bi = kaptchaProducer.createImage(capText);
		ServletOutputStream out = response.getOutputStream();
		// write the data out
		ImageIO.write(bi, "jpg", out);
		try {
			out.flush();
		} finally {
			out.close();
		}
	}

}